﻿using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication3
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string name = Username.Text;
            string pwd = Password.Text;
            string constr = "server=.;pwd=123456;database=Student_db";
            SqlConnection con = new SqlConnection(constr);
            SqlCommand cmd = null;
            string sql = "select * from StudentInfo where stu_name=@name and stu_password=@pwd";
            SqlParameter[] pars = {
                new SqlParameter("@name",name),
                new SqlParameter("@pwd",pwd)
            };


            try
            {

                con.Open();
                cmd = new SqlCommand(sql,con);
                cmd.Parameters.AddRange(pars);
             //int result=cmd.ExecuteNonQuery();
             SqlDataReader sdr = cmd.ExecuteReader();
                if (sdr.Read())
                {
                    Session["CurrentUserName"] = name;
                    Literal1.Text = "登录成功！！";
                    Response.Redirect("Home.aspx");
                }
                else
                {
                    Literal1.Text="用户名或者密码错误";
                }

                
            }
            catch (Exception ex)
            {

                throw new Exception(ex.Message);
            }
            finally
            {
                if (con != null)
                {
                    con.Close();
                }
            }
            try
            {
            using (SqlConnection con1 = new SqlConnection(constr))
            {

            }
            }
            catch (Exception ex)
            {

                throw new Exception(ex.Message);
            }


        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            Response.Redirect("Register.aspx");
        }
    }
}